Question

find the length of AB

a) 2 squareroot 2
b) 4
c) squareroot 2
d) n squareroot 2 over 2

Answer 1

a) 2 squareroot 2

Answer 2

\[AB ^{2}= AC ^{2}+BC ^{2} \rightarrow AB = \sqrt{AC ^{2}+BC ^{2}}= \sqrt{4+4} = 2\sqrt{2}\]

so answer a